425639650561 has 2 divisors, whose sum is σ = 425639650562. Its totient is φ = 425639650560.

The previous prime is 425639650507. The next prime is 425639650571. The reversal of 425639650561 is 165056936524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425422235536 + 217415025 = 652244^2 + 14745^2 .

It is a cyclic number.

It is not a de Polignac number, because 425639650561 - 2⁷ = 425639650433 is a prime.

It is a super-2 number, since 2×425639650561² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 425639650499 and 425639650508.

It is not a weakly prime, because it can be changed into another prime (425639650571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212819825280 + 212819825281.

It is an arithmetic number, because the mean of its divisors is an integer number (212819825281).

Almost surely, 2^425639650561 is an apocalyptic number.

It is an amenable number.

425639650561 is a deficient number, since it is larger than the sum of its proper divisors (1).

425639650561 is an equidigital number, since it uses as much as digits as its factorization.

425639650561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 425639650561 in words is "four hundred twenty-five billion, six hundred thirty-nine million, six hundred fifty thousand, five hundred sixty-one".